let me answer your Q with another Q: How would have moving to Juve been any different?
seriously, though, I don't think you should see this as Drogba dying to move to Galata - it's more of him wanting to gtfo of China. Not sure if he was indeed not being paid by the Chinese club but at this point in time it seems to me any European club that plays in the CL and is willing to offer him good moneys for a short contract, would have sufficed as long he got his ass out of China in the process. Why Galata? Well, it's not exactly there was a long line of teams still in the CL, and likely to play CL football next year too, that is willing to give a 35 yo pre-retirement guy 6 mil a season. After all, the teams that do stand a chance to win the CL are either looking elsewhere or have Mr. Scroogotta for a GM