Never get freaked out by a YouTube video shooting fruit, lol.
Don't lump all 45# bows together, either. Different draw lengths and bow styles makes a huge difference.
Skinny 2 blades penetrate the best, all things being equal, but it is the rare situation where that is the difference maker. Know your quarry. If you are worried about penetration on a javelina, and to a large extent deer, you may be tempted to address that issue at the expense of other issues. I child's bow will almost always get adequate penetration on these animals, but you will be more likely to recover them with better blood on the ground with a larger broadhead. I know, some people worry about hitting heavy bone, but the vast majority of time, if you do, your trajectory for the vitals is not good anyway.
Hogs are a different matter, but Robert Carter has killed a gazillian with lightweight bows. Yes, he doesn't use larger heads and is selective in his choice of shots. For me, this is one of the best arguments for using a slightly more energetic setup. Having the ability to penetrate a large boar with a decent size 3 blade of 4 blade and put enough blood on the ground for a quick blood trail, especially in the summer. With marginal poundage, you probably will want to go with a 2 blade, but I still wouldn't choose a skinny broadhead for penetration sake. Just my opinion. I have stuck quite a few.
And please, if you can only accurately shoot 45#, don't let if stop you from hunting pigs. It is the very rare pig that will give you problems with that poundage.
This is a hog that I killed with a 1950’s Paul Bunyan Recurve. 47# or so. The only hog that I short with a skinny 2 blade, due to the bow that I was using.
https://youtube.com/shorts/bpFw7o_iynM?feature=share