Does having more focus points give you a "better" camera?

It rather depends what you want to do with it.

As a lens can only focus at a single distance at any one time, then if you're taking photos of still or slowly moving subjects, it's not going to make much difference at all.
Even if you use focus/recompose [1] you could still get away perfectly well with a single AF point.
Landscape photography, portrait, product... all can be done perfectly well with a single AF point.

On the other hand, if you're trying to shoot a sports game, then you'll need good 3D tracking, so your intended subject stays in focus all the time.
For this, even 39 points is barely enough, unless you can keep your subject reasonably centred in the frame.

Thirdly, if you use the camera on 'full auto' then you have to rely on it making best guesses as to what you actually intend to be the main subject of your photo. Sometimes, this makes 39 points a bit much... it's not actually intelligent & doesn't know you want a picture of the dog rather than its owner, so will blindly guess at the most significant contrasty bit in near-field, & you'll end up half-squeezing 3 or 4 times til it gets it right.

Note: You can always reduce the number of points it will use, via the control panel. I have a 39-point camera - 20% of the time I have it on 39-point, 60% on single point, [20% any other setting], but that's because most of the time I'm shooting things that don't move.

[1] Focus/recompose - briefly, to use the single central focus point; aim at e.g. the nearest eye of your subject, then without changing distance, move your framing until you have a more 'interesting' composition & then take the shot.