Yeah, I know what you mean - it feels like it's going to cost us a win at any moment. But then part of me also wonders whether we're maybe worrying more about this more than we need to at the moment? Yes, Lacazette misses a lot, and could / should / will be upgraded on in the summer... but for all of those misses the attack still somehow works, really, really well with him in there. Since we dropped Auba I think we're only third to Man City and Liverpool in terms of chances created, xG and goals scored, so something is going right. Our wide players are our strikers in this system: Saka, ESR and Martinelli, and If Pepe has found his second-half-of-the-season form again then you can add him to that group too. Ødegaard was also scoring semi-frequently before Christmas and should be well capable of chipping in with some goals - I'd even chuck Gabriel in there as a reliable threat from set-pieces. That's 6 credible goal threats without even needing to look at the two nominal CFs. If Laca and Nketiah can contribute anything at all then you could almost say it's a bonus.
Also, let's not forget that the aim is to score more than we concede, and our defence is looking a lot more solid than any of our direct rivals' right now.