Doubtful, not saying it's harmless but microplastics are everywhere, asbestos is not. We should research it but should not jump to the conclusion that it might be worse than a known horrible material.
Asbestos had clear links to various kinds of horrible conditions known all the way back to the early 1900s. Microplastics might increase some kinds of cancer and screw with some hormone signalling but we haven't seen such clear links yet to the same kinds of conditions.
The hunch that asbestos is really bad for human health is very old. The Greek geographer Strabo and the Roman naturalist Pliny the Elder both reported a sickness of the lungs in the slaves who wove asbestos into cloth.
