I would strongly disagree with this. Amps come and go, and even a terrible amp makes some interesting sounds. But a bad guitar is just plain no fun to play. You end up always fighting it. When I bought my first electric, I didn’t even have an amp, but since the guitar played nicely, I stuck with it despite the lack of volume. Hell, for almost no money these days, you can buy something like a Pocket Pod and instead of having one amp, you could effectively have dozens.
All that aside, as a long-time electric guitar player who finally bought a great dread, I now think I’d recommend starting with an acoustic. For one thing, it’s self contained. If you want to go over and play with a friend, you’ve only got one thing to bring, and it’s ready to go when you open the case, no looking for outlets, running cables, etc. Your technique will have to be better from the get go, and to be honest, I know lots of stuff that sounds cool on a solo acoustic, but not all that much stuff that sounds great rocking the electric all by itself.
It’s not really like I think you can go wrong either way, but I think I would have enjoyed starting with acoustic more.