Hi John,
Apple's design philosophy (keep it simple and non-technical on the surface) is pretty well known, so to me it's not that surprising when they extend that philosophy to Numbers: quite a bit of power under the hood but a deceptively simple interface.
My experience shouldn't be an issue here. But since you brought it up, I am a long-time heavy user of spreadsheets, of Excel more than Numbers, but I find Numbers handy as well, and thought I'd point out my perspective, in response to your "are you kidding?" comment.
In Numbers, column letters and row numbers are just a quick click or a tap away, quite handy for my needs, and I like the fact that they recede gracefully into the background when not needed.
If unlike me you still do a lot of printing out to static reports (as opposed to sharing results dynamically online or on, say, a tablet) then you won't be as happy with Numbers as with many other spreadsheets.
But, as I say, you might consider in your menu going to Numbers > Provide Numbers Feedback.
SG