At some point employers will use a 'formula' or computer systems will use an algorithm when you apply for a job.
You'll need a certain amount of PIC time in comparison with your total time.
I'll give you an example, I have 10500 hrs TT and 8900 hrs PIC but only 1700hrs Jet.
This will get me flagged on online applications which most US based airlines use.
This also means that a lot of the time I will not be given the opportunity to explain that I've been a full time professional instructor for 13 years.
The 'puter flags my application and I'm out.
How do I know this to be fact?
I've applied with a JetBlue 6(!) times in 3 years and the last time I had 2 internal recommendations and I didn't even get a confirmation of application.