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Climate change isn't a simple product of CO2 emission. It's a result of fossil carbon that was outside of the earth's carbon cycle for millions of years being reintroduced to the system.

Biofuels made from plants are rereleasing carbon that the plants collected. They're more or less carbon neutral, assuming the existence of more plants growing. Biofuels won't help remove the excess carbon from the atmosphere, but they certainly can help mitigate the rapid bleeding by cutting down on fossil fuel use.

This is especially important for aviation, where the usage of batteries is almost certainly impossible for practical use.

Of course, the ideal thing to do is remove carbon from the atmosphere and not use it. But getting to net zero first is necessary.