Thanks for the guitar info!
The amount of wear in that time does sound on the excessive side... Realistically I would expect many many years before a refret is necessary, but as you mention there are contributing factors..
If you have a PARTICULARLY heavy way of playing, with a LOT of bends and vibrato then that will speed up wear, but not horrendously so.
If you have been using stainless steel guitar strings, then they will be harder than the frets and can speed up wear.
It's possible though not particularly likely that there was a bad batch of metal.
The frets are most likely nickel silver, which is a very hard material all in all. All frets will wear eventually but even my current daily use electric bass is 12 years old now and the frets are more or less fine, still, I gave them a re-crown once and thats it. Even though an expensive guitar will have theoretically better frets it'll be more or less the same alloy, more or less the same toughness (ie, tough). It's hard to predict an hour rating but my guess for frets on any new guitar would be 'a lot', and if stainless steel 'a hell of a lot'.
A refret is a long and slightly arduos job that will probably cost more than the guitar. If you like it of course, then you may judge it as worth doing, I did that with my banger classical parlour acoustic just because it had some story that I wanted to preserve! In that case then I would PROBABLY just get nickel silver back on it, there is the option of going to harder stainless steel but thats a pig to work with and costs more money. And arguably, if it was caused by technique and you wore nickel silver in 700 hours then you'd probably still manage to get through stainless steel eventually too! For me, stainless steel is overkill unless it's a particularly special guitar. Some luthiers don't like working with it as it's so hard and tough on tools etc, others say it's fine! For me personally, my cutters find it hard enough to get through nickel silver cleanly, but I should probably just get a better tool if I was doing refrets more often!
Edit - theres also evo, another copper alloy which is about halfway between nickel silver and stainless in hardness. And actually a whole lot of other alloys, all roughly some kind of white brass or gold brass, if you start going down the 'what frets to use hole' you can go in circles for hours! For me the standard ones labelled 18% nickel silver are fine in all but special cases.
I think more likely, if you have had it from new, is that you got a bad batch of frets, but a fret level and crown is a much easier job than a refret so I may tentatively advise trying that first. Even if it DOES wear again in a couple of years you've got your monies worth out of THOSE frets, confirmed that it's going to keep on wearing and then you can make a choice to stick with that guitar and refret, or move on.
This also gives you chance to look at your technique a bit, see if you are using excessive force and really scraping the string against the frets!