Even if that was always the case (I'm confident it won't be), compare it to, say, coal fly ash. In my country, coal ash is 1/5th of all waste generated (by weight, I think) over a year. 12 million metric tonnes per year [1]. And that's before even thinking about CO2 and other air pollutants.
Wind turbine waste is almost nothing compared to that. Still worth fixing, but perspective is important.
Oh, I don't think this is a significant problem - and agree that the volume of this fairly inert waste product is trivial in comparison to the huge volumes of nasties that come out of fossil fuel power stations.
I'm sure these turbine blades will likely continue to be iteratively re-designed to be increasingly recyclable or at least re-purposable as times goes on.
I was just answering the question about remediation costs for wind turbines, as this feature of the current popular implementations is often a surprise.
There are 100% recyclable blades (including production byproducts) currently being tested. They are using Elium as the composite material which can be chemically broken down back into glass fibre and resin for reuse.
'What What happens to all the old wind turbines?' (bbc.co.uk) [2020]
https://news.ycombinator.com/item?id=22265321