There certainly are arguments against a draft at the individual level - Example being if the people being drafted do not believe in their own governments ability to lead.

A draft is by definition forced labor either way - because if enough people volunteered there would be no need for a draft in the first place.

But usually it doesn't matter either way. Either the people believe in their own government/territory and see it as worth defending, or alternatively they don't believe in it, but their government is authoritarian and will force you at risk of punishment or death into being drafted.

In both cases a draft is still forced labor for those who did not volunteer to participate.

If there's anything worth defending, people will volunteer to defend it.

States have a legitimate right to taxation. Taxes can be used to pay volunteers. While there are still people owning wealth above the poverty level, there is no excuse to force people into military slavery. And even if literally everybody has been taxed into poverty, there are more ethical alternatives than slavery, e.g. tying the right to vote to military service like in Starship Troopers. Freedom from slavery is extremely high on the scale of ethical importance, even more important than democracy.

There is shit ton of opposition, people are literally defending themselves with guns from kidnappers !