First off, we never have luck in the lottery, and so tanking this season and then getting a pick between 6-10 would be IMO, a bit of a failure in regards to tanking for the top 5 pick.
More reasons:
1. Our roster is much better than last year's and we got 25 wins last year. We can probably get anywhere from 30-45 wins next season and potentially get a playoff spot. It all depends but we should get more wins this year than last year.
2. Boston is a city that holds pride in winning, and while many here would support tanking, a majority of people living in Boston would despise it again this year.
3. Teams like the Bucks/76ers are likely to get a high lottery pick again.
4. What if we fail this season in regards to getting a top 5 lotto pick, what's next? Tank again 2015-2016?!!
5. Tanking won't help in luring FA next season to Boston, they will think we won't have any chance 2015-2016 season. Winning more games and potentially getting a playoff spot makes it more enticing for FA to sign in Boston.
Just my thoughts as to why I feel we should try to win more games next season, and maybe compete for a playoff spot in the East. Also, before posting scouting vids about potential lottery-bound draftees like Okafor on this post, realize that last year lots of people hyped about us getting Embiid, Wiggins or Parker. Instead we got Smart at 6, and while I still like that move a lot and think it's a steal in the draft, the celtics probably would have got smart even at pick number 20.