So is it a defect? I mean, are those rubber pads definitely clean and spotless?
The reason why tactile is more preferred is because it provides a nice balance between gaming and typing (well, not in some cases). Linear mechanical switches are the "worst" type of mechanical switch for typing. This isn't to say that they flat-out suck for typing or anything like that, but the tactile response of tactile switches just makes for a superior typing experience. It's as though it increases the sense of precision.
So, the resistance during the keystroke that we can call the "tactile feedback", or "the tactile bump" is nowhere near enough to stop you from bottoming out. Instead, it just feels nice to type and to press.
Again, rubber domes try to mimic tactile switches (but do a bad job). So, it's not hard to get used to at all.
For me, I was like a fish to water. However, if I had gone from rubber dome to something linear like the Cherry MX Blacks, then I definitely would have had to get used to it. I think it would feel kinda strange typing on a keyboard that provided zero tactile feedback. But at the same time, I think it would provide for a nice smooth feeling or something - I don't know. But I do know one thing: the tactility of good mechanical switches is just there to provide a nice feeling to the keystroke. It's certainly far superior to the lame tactile feedback provided by rubber domes because with a rubber dome, the tactile bump basically throws you to the bottom of the keystroke (there really isn't much key travel at all). But with good tactile mechanical switches, there's still some key travel left after the tactile bump. It's really nice!
But then there are some tactile switches that have the tactile bump closer to the bottom of the keystroke, such as the Buckling Spring type. Some people actually prefer this quite a bit over something like the Cherry MX Blues.