Pft, yeu're not "stuck in a certain type and can't escape" as many people seem to think... the "types" are very very broad generalizations which still cover vast expanses. A 3w4 ENTP would be massively different from a 7w6 ENTP, despite both being ENTP.
And even then, it can be split far farther than that as well.
Yeur "type" is yeur preference and how yeu generally tend to react by default and whot yeur values are. These may influence yeur work habits, or which positions yeu may happen to take that're available to yeu, but there's alot of external things that change that too... who yeu know, which opportunities yeu had such as schooling, and things like that have a far greater effect.
On AVERAGE though, an ENTP, speaking of myself as example as I'm really not qualified to talk about others, will GENERALLY bounce between career paths frequently... I know I get bored of things easily, hence I took a career path which this is NORMAL to occur... 3d animation in film/games, where yeu could be working on a movie one month doing lighting effects, and the next month rigging models for a game, and a year later be doing animations for cutscenes for a different company entirely.
If yeu take yeur strengths and work with them, mine being adaptability to changing environments as one of my strongest, and do whot yeu enjoy, yeu'll generally end up making good wages no matter whot it is yeu do.
Those who can't figure out whot they want to do will flail about like fish out of water, regardless of type. Though some are more resistant to such than others, as STJ's for example will tend to have a very solid work ethic regardless of their personal feelings of the job. That's a generality of course, but anyways.
The idea, though, is that yeu aren't "stuck" in yeur stereotype... yeu are "stuck" in yeur TYPE, that won't really change as such, yeu just may not understand yeurself well enough to type yeurself correctly before that is all. But the stereotypes? No, there's too many different variations on a theme... and that's all a type is... a generalized theme which has several core values, but alot of latitude on how they express those values.
That is also why yeu won't see HUGE differences in pay grades from different types... some types may be more likely to prefer high paying jobs (lawyer, doctor, accountant, something with lots of long long long hours of study), while another may prefer something which lets them MAKE stuff, regardless of whether it pays well or not (and more than a few starving artists will drag down the average), HOWEVER, it doesn't mean they ALL will do whot they prefer... I'm sure there's more than a few people out there doing jobs their mindset just flat out isn't specialized for, but they do it anyway. Are there jobs I could get that pay better than whot I'm studying for? Well yeah, but I don't want those. Another ENTP might be willing to take those opportunities anyway out of curiousity whereas I'm interested in whot I'm aiming for regardless of the pay. That's individual, not type.
So really, type doesn't have that big of a difference. Anyone can be mostly anything (well no yeu may not be capable of being a ballerina, and yeu may not be physically built to be an astronaut, but it doesn't mean yeu're forced to work at mcdonald's either), within reason, it's just some types PREFER certain jobs that generally pay better. Whether they actually go with that line of work or not is up to the individual, not the type, to decide.