Exactly this.
It doesn't take much square footage of fake grass to have a massive impact on the wee beasties living in your garden. It drastically reduces or removes movement, nesting and breeding. This means a lack of the small bugs. Even the heat of your hot lawn layer of plastic in the summer will kill off any bugs living around the edge.
These bugs are now out of the food chain, impacting the birds, hedgehogs etc . Now there are no bugs, the birds, hedgehogs etc are going hungry.
And the more idiots people who put down plastic there are, the more back garden habitat is lost, and the bigger the impact.
There are many other impacts too - like the increased risk if flash flooding (plastic cannot absorb water nearly as quickly as grass, despite any number of drainage holes). People living in flood prone areas really really shouldn't lay down large sheets of plastic - and if they do, then I wouldn't blame their insurance companies for not paying out!
But apparently that is all rubbish, and fake turf look soooo magnificent, we should just accept the negative impacts to our environment, so someone can look out their window and go "oohhh look, it's all one lovely shade of green, with no variation or interest"