Gpu algos are also having constant issues with 51 attacks. Asics solves this issue bc nothing competes with asics. Gpu were never intended to be mining cards and if you GPU fanatics love mining so much you should switch over to fpga or asics since they are purposely built for it.
Otherwise it's like saying "hey I love racing and Toyota Corolla is the best car bc it can also do 40 mpg and go a little fast"
with ASICs chances of a Network attack is higher. Only decentralization can help reducing it. What limits someone/somegroup to buy/rent lots of hashrate regardless of it being ASICs or GPU.