I agree. As much as I would like there to be microbial life in the atmosphere of Venus producing this excess phosphine, I suspect that there is some abiotic process happening that we don't understand as yet. Also, I didn't have "finding alien life" on my 2020 bingo card. :P
In any case, even if this should turn out to be a previously unknown, abiotic chemical process, it is still a significant discovery. It's just not time to run out and say "we found aliens!" yet.