IMO a wHOLE lot of scare tactics... plugged tyres have always worked well for me, and I've had plenty over my lifetime. Certainly in really extreme high speed situations i.e. on the racetrack, a plugged tyre is not appropriate. For the rest of us, repairing a puncture on either a motorcycle or car tyre will work in most situations where the tyre suffers a 'typical' puncture e.g. not in the side wall. I've had a couple of tyres where several plugs have been used and the tyre worked well right to the end of its usable life on my bike.

I've seen a match stick applied to a ZZR600 rear tyre and get the rider bike home, and that was on a tyre which had little to no tread remaining. The guy was friends of friends in some small town some place in Anhui, who joined our posse as we passed through that part of the province.

While a caveat might be appropriate in regards to the use of plug repairs to tyres, in my experience not one of the many plugs I've applied in China on any of my bikes has failed, nor have I had to replace any tyre as a consequence. I've also used the tyre repair in a can to inflate/fix punctures, and they are more hit and miss solutions, but that might have more to do with the fact that all are Chinese made products costing about 元10 /can.