1-It’s a big ninja world. Hashirama does not know who can and can’t tame the bijju 2-Hashirama wanted his people and the world to be safe so he needed to get the bijju before they harmed anyone 3-Hashirama wanted to share the bijju as a sign of peace. (which DID cause peace even if it was for a lil bit (it was longer peace than Tobirama had))
And look what good that dim him? Tobirama sowed the seeds of distrust. He started a massacure of his own villagers. Not only that because of him Saskue is well…. SASKUE! If it was not for Saskue the Jubbi would not have 8tail chakra. Hashirama HAD to give out the bijju for multiple reasons
And look what good that did him? he took Bijuu that no one could tame or even thinking about and gave them to enemy, causes 4 of the biggest shinobi world wars in history because now people were getting greedy or were scared that people were going to attack them for their bijuu. Now they both had good intensions that much is true however, between the two Hashirama caused more problems with his screw up than Tobirama did.
Keeping watch over them was uneeded. It showed distrust and betrayal. Afterall the Uchiha did nothing wrong. They even ditched Madara for the leaf. They were treated differently than the other clans. No Tobirama did not say they had to stay there but he put them there for a “reason”. Making them part of the police was just an excuse. The clan did not go their on their own. It was where the police station was assigned to be. Hyuuga’s section are not on the outskirts of the village. Hashirama took the bijju because they would be used for evil and to mantian peace.
I'm not saying that was Tobirama did was perfect, however the worst he's done at the most is keep a close eye on them I mean personal responsibilty comes in to play at some point, yes Tobirama sent them off to a corner of the village, HOWEVER, he never said in any way shape or form "you cannot come out of this corner, you cannot hang out with the rest of the villagers" They decided for whatever reason they had not to go and mingle with the rest of village. No one said the they had to stay there ALL DAY that is just where their clan lived, just like hyuuga's have their own section. Hashirama however, comepletely took the Bijuu's freedom away for absolutely no reason basically.
Oh, Jesus, why can't you just watch the episodes and honestly it's just common sense that you use a military force in a war. I mean I can go through it and find it for you, because honestly and I'm not trying to be rude, but you're kind of acting like a retard.