I echo Whatsarunway's comments.
The jobs will still be there, albeit in decreasing numbers as the nature of the industry changes, but there will also probably be less people going into it since more will be choosing fixed wing for the perceived better lifestyle/career/money.
Admittedly, I also smile on a Monday morning, but only when it's a day off!, (but that would be the same whatever career I chose!) It's the best job I've had, and I'm still doing it, so it can't be that bad. If you really want to do it, do so.
How many people have said too late in life, "I wish I'd done that"?