On the other, as a Windows desktop person I can't live without Home/End/PgUp/Pgdown, and in different combinations with Shift/Control. That's one of reason I can't fully enjoy MacBook, not to mention the incredible fact that it doesn't have a Delete key. No, it's not the same that you can use modifier key with backspace, modifier keys are used for extra functionality, i.e. to delete to begining or end of the word, etc.
Macs have every one of those, just with different shortcuts: https://support.apple.com/en-us/102650
Sure, but using modifier keys. What if I want to add shift to the mix to select, let's say to the beginning of line or document? You'll need to press two modifiers. That's not optimal. And I use these all the time while editing.
And I don't consider this a MacBook flaw particularly, it's more or less general laptop flaw nowadays. If anything, other manufacturers have even more imagination to mess up keyboard layout.
Eh, I dunno. I played piano, so I'm not allergic to pressing 10 keys and a couple of foot pedals at once if needed. Here, that means I rarely consciously think about what chord I'm pressing to select from here to the beginning of the word/line/document.