I run a shop and we have a dealership account. I guess they got sick of managing and handling it themselves. I admit it's a hard pill to swallow when trying to do what you know is right vs time constraint. The good news is that the polishing process is really the only place where it becomes an issue. You can do simple things such as maybe recommending better micro fibers as a good place to start. Build up a little seniority there and you can slowly build a reputation as a quality detail and maybe your words will start to carry more weight. Would it be great to have a flex or rupes, multiple pads, menzerna products, etc.... Of course it would.
I still think you will pick up great experience there, learn some tips and tricks you might not have learned yet for interior detailing.