Bananas are the way they are through millenia of selective breeding, so there's no reason to think that monkeys know anything we don't. If pinching the bottom is easier than bending the stem, your banana isn't ripe yet and doesn't want to be eaten until later.
A) that seems backwards: an under ripe banana will be stiff inside so you can snap the peel around the stem when you bend it, while a riper, softer banana will mush inside when you bend the stem. And,
A) The peel becomes easier to tear faster than the inside gets softer. You don't need to snap it, it doesn't need nearly enough tension to count as a snap once it's ripe.
B) The banana's been selectively bred to want to be as delicious as possible. It only wants you to be happy.
Yes. Every time, it's gone less well than opening a banana from the stem end, unless the banana was horrendously underripe. I've never had the problem the alternative approach is claiming to fix unless I've intentionally opened the banana badly on purpose to prove a point about the problem really being people opening from the stem end incompetently.
While I can concede your point that it's feasible and possibly even more practical to open from the stem, I gotta say that since switching to the other end years ago(because I saw a similar thread on reddit), it's been super easy and I've had zero issues. The stem just has a higher rate of fucking up, but it's not like either end will fully decimate the banana. Peeling properly after it's opened is an easy fix either way.
Take one end in each hand, hold it "like a frown" in front of you.
Bend it in half downward and bite the peak of the bend with one of your canines.
when it snaps open, shove one half of the banana into your mouth, (chew if needed, then) swallow.
Shovel the other half into your mount, (chew if needed, then) swallow.
My partner hates when I open bananas like this because there's a little dark part of the banana under that end of the peel that she calls "The Ban-anus" and thinks it's gross even if I pick off that part and don't eat it.