That's comparing apple with orange.
Hotel that increase price during busy season is because of supply and demand. Same with flower seller. That's economic 101. There are other legitimate reasons to drive up price. I.e. More passenger in the train, more maintenance required, more cars need to be ordered, etc.
Scalping is not a byproduct of that, just pure greed and take advantage of other people. Also, just because you can do it doesn't mean it's legal. I.e. your landlord can increase the apartment deposit to $50,000 (10 times the monthly rent) because there are more people willing to rent the apartment and that's only 1 available. He can do it, but the law (at least in the U.S.) will prohibit him to do that.
Scalping is ILLEGAL in certain countries and county, because they drive up price unnecessarily. I.e. Scalping tickets during game time. Unfortunately, the law hasn't caught up with time...
But based on your logic, it's ok for you to not being able to buy ANY product at the manufacturer or authorized reseller price, but 3 times of that from the scalper. I guess each to his own.....