Some vocations, you can't learn everything in a year.
After ten years as a flight instructor - with an ATP and a class one -
I was just starting to be learn the ropes. Had already been a CFI at
more than one school by that point. Not everyone is a natural instructor,
I sure as fuck wasn't. After 20 years of instructing, I think I struggled
to achieve "average". I always got along better with machines than people.
On the subject of flying different types ... in the old days, more pilots did
it, but it wasn't well-understood. Some pilots did it effortlessly, others
did not, and we didn't discuss it much.
These days, pilots typically fly very few types and are not very good at
adapting quickly to different flight control responses, different inertia,
different spool-up, different sight pictures.
They certainly don't learn about different systems very easily - they need
a week or two of ground school training to fly a different type, and you
will die if you don't learn the critical systems. No one mentioned that much
in the old days.
Reminds me of my first takeoff in a Piaggio Royal Gull, which was out
of C of G with full tanks and a pilot. Geared pusher twin flying boat
taildragger. As reliable as you would expect any antique Italian vehicle
to be. Felt like a Seabee on the ground.
I loved it! Oddly the flight instructors at the local FTU declined to check
me out in it. At the time, I believe four in the world were still flying.
It's not unsafe to jump from one type to another. There is a place you
can learn to do this. It's called Test Pilot School, and will cost you several
million dollars and a year of your life, which doesn't seem unreasonable.
Hell, I wasted six months of my life, importing two L39's!
I ain't asking nobody for nothing, if I can't get it on my own.