"I have to confess, the build setup is the most intimidating part of modern web development for me."
Here here.
Here here.
Even with an SPA - assuming you use a framework that doesn't force you through a build pipeline.
Even if the build setup is the most complex thing on the face of the earth, if you or team members get reported for undermining the team because you don't understand it, then those are not the team members or managers you want to work with or for.