Just do them when renewable supply is high and demand is low; that energy can't be stored and would have been wasted anyway.
Again, look at bitcoin mining, the miners will happily pay any carbon tax to work 24/7, it's better to run the farm to cover electricity prices and then make some pennies then to keep it off and incur depreciation costs.
In addition, even 100% renewable would be attainable, that would still require massive infrastructure investment, resource use and associated emissions, since most of the corresponding industries, such as concrete and steel production, aluminum and copper ore mining and refining etc. are very far from net zero and will stay that way for decades.
To throw into this planet-sized bonfire a large uninterruptible consumer, whose standby capital depreciation on things like state of the art datacenters far exceeds the cost most industries are willing to pay for energy, all predicated on the idea that "demand spurs renewable investments", is frankly idiotic.