Yeah, it really wasn’t clear. It could’ve also been sarcastic (because you might think it’s very obviously bad) or it could’ve been aggressive (because folks suffering from toxic masculinity will feel like you’re questioning their whole identity).
It’s just hard to tell from plain text, what your intention is. My response kind of had to navigate all three interpretations.

But yeah, so proteins are kind of cool, because they take relatively long to digest (similar to whole-grain foods, for example). This means they stay around in your stomach for multiple hours, keeping you relatively satiated over time and also helping to keep blood sugar levels at a steady rate (which is what we want).

But on the flipside, proteins don’t take up a lot of volume, so if you eat only protein-rich foods, you will have to eat far too much of it before you feel satiated, since our body mainly registers satiation by how full the stomach is.
This is made worse for bacon, egg and cheese, because they’re also relatively fatty/greasy foods, which is an even more condensed form of energy.

And unlike whole-grain foods or beans, there’s also not a lot of fiber in bacon/egg/cheese. Fiber passes through your digestive system undigested, meaning it’s free real estate volume to help fill up your stomach and it helps to loosen up what comes out on the other side.
Very little fiber in combination with the protein taking relatively long to digest is why constipation is likely when eating only protein-rich foods.

This info-dump brought to you by Autism.

You can substitute the ham for jelly, assuming it’s kosher