I think that argument goes by broken window fallacy.

Besides, I see that 5% resp. 8% of ALL steemit posts start with "Welcome" resp. "Thank". Just imagine the waste of energy :^P

4923 | Welcome to steemit, ... | istiaq69 |
4924 | Welcome to Steem @ja... | bottymcbotface |
4938 | Welcome to steemit. ... | mountrock |
4940 | Welcome to the steem... | selenanunu |
4964 | Welcome to steem @bl... | nickdavison |
4969 | Welcome dear friend ... | saqib |
4971 | Welcome @Jackrobins ... | mekong |
4978 | Welcome to steemit, ... | istiaq69 |
4979 | Welcome and Happy Bi... | mikej |
5019 | Welcome to steemit, ... | istiaq69 |
5032 | welcome diana ;)... | awpmaster |
5041 | Welcome @laidback.tr... | nickdavison |