I'm the opposite. No matter how hot it is, I'm wearing full-length jeans. It's never bothered me, and I've had significantly fewer instances of finding ticks on my body compared to my friends.
Genuine question, what are you doing on a regular basis where you would expect to get ticks on you while wearing jeans? Are you a pokemon trainer walking through tall grass all day?
Hiking and fishing, mostly. It doesn't take much to get a tick. If they get near my feet they can latch onto my ankle if I don't catch them soon enough.
If you live close enough to one of the poles there are two times a year where it is annoyingly cold in the morning and slovenly warm in the afternoon. A half-n-half strat of shorts and long sleeve especially if being active is ideal.
It's easier to layer tops than bottoms. So shorts with short sleeves covered with a button up long sleeve can be surprisingly practical even though it feels silly. Open the button up when it starts to get a bit warm, and remove it entirely when active in the sun. Large diurnal temperature swings can mean committing some fashion faux pas.