MacBook Pros not being user serviceable at every component level doesn’t mean they’re not environmentally friendly - not by a long shot. In fact, building a device like that might even shorten lifespan in a laptop form-factor, not to mention no one wants to carry around a heavy, clunky machine so it likely wouldn’t sell anyway.
Here’s an example report that mostly has to do with the production and recycling aspects: https://www.apple.com/environment/pdf/products/notebooks/15-...
When people are done with their MacBooks they don’t just throw them out - they sell them or hand them down to their relatives/kids because they still work well enough, are supported by the manufacturer, are durable and have very high resale value in secondary markets.
Robust engineering, longevity, support, and resale markets do more for the environment than making components user-replaceable.
My old 2011 MacBook Air is still going strong and being used by my mother. If anything goes wrong, she can take it to the Apple store and get help promptly. She still gets software updates, and that thing can STILL be sold for ~$250-300 on eBay, Swappa or Nextdoor. If the machine breaks completely, she can take it into the Apple store to get it properly recycled in almost any part of the world.
That’s what minding the environment looks like. You have to look at the entire lifecycle of the product from the moment the raw materials are sourced all the way to making it easy to recycle when a product is end-of-life.