What conflict is mostly about, and which a large proportion of the workers don't care about (at Tesla and elsewhere for that matter) is a mutually binding framework for how terms of employment are negotiated.
Tesla (obviously) prefer to retain the possibility to dictate all terms unilaterally, the unions want the worker collective to have a say and the possibility to negotiate. It is a very basic, classic and boring conflict in that sense.
The Swedish model for labour relations is mostly working quite well, both now and for the past 100 years. It works well enough that 90+% of people have no idea about what it is the unions do. In order for the model to work it needs a large part of businesses/unions to participate.
What we are seeing now is an interesting test of the conflict escalation toolbox. I'm not at all sure how it will end. If the unions fail, it might be the start of a general move to a US-style "everyone-fends-for-themselves" labour market, with minimum wages etc regulated by law. (Sweden does not have a minimum wage by law, for example).