Point taken but if one doesn't know how to weld at all, it might look a bit more daunting. I may go this route eventually. If this was an original/new condition spoiler, I would be much more inclined to mount it as intended. This fiberglass repro is fine but it's far from perfect. Between my two jobs, I invested absolutely as much time as I'm willing to spend sanding, priming, sanding, etc. I hit it with the same Blitz Black that I used on my hood and it will look great from 20 feet but still maybe not quite good enough to permanently alter the sheet metal of the car if I decide that it's not good enough.
While nothing about my car is especially rare or "collectible," After 26 years (a few years more than half my life at this point), I have an irrational loyalty that compels me to do the least invasive mods possible while still improving the car. I will cut/drill/etc. but only after exhausting every "non-surgical" possibility first.