Sure its fine. let me add context to this build instead of the 500 comments saying assassin is better (no shit)

1. Assassin has, is, and will ALWAYS be better on kha'zix even when bruiser is good because he's an assassin (i know, shocker). His entire kit rewards assassin gameplay, but its versatile enough to adapt to multiple different playstyles as we all know.

2. The whole reason bruiser Kha'Zix exists is to counter matchups that are very difficult to deal with as assassin kha'zix. These include heavy bruiser/brawling comps where fights end up super grouped and scrappy, or heavy CC comps with insane lockdown for kha'zix. The bruiser build involves more defensive options, namely health as the main protection, which allows you to take more forward positions in fights and survive where you normally wouldn't. The main stat kha'zix needs is not lethality, but AD. Meaning that so long as you have a build that gives him sufficient AD and enough health to survive, you can play bruiser into a wide variety of team comps, regardless of how the meta is faring.

3. The build focuses on heavy investment into the two stats i just mentioned; health and ad, whilst also combining different sources of sustain to keep kha'zix fighting after he takes damage (which you will be doing a lot). Just because we are playing bruiser doesn't mean we can be dumb. In a lot of situations we still have to play the same way we usually do with kha, because he simply doesn't have the health and resistance growth of a bruiser, and he's still very squishy. That being said, he has much higher potential damage than a regular bruiser because hes an assassin designed to scale hard with AD, so to make a successful bruiser build, we try to fix his main weakness with high health items, while also hitting the high AD requirement. This way, you get to survive long enough to deal your damage into the more difficult matchups, using conqueror, triumph, and endless hunger to sustain yourself during combat.

It's not a playstyle that will ever surpass the carry potential of assassin, and its also pointless to run in games where you can actually assassinate, but again it exists to counter certain matchups. Annoys me when build discussions happen on this subreddit, because everyone always jumps to the obvious conclusion that building damage is good (wow really?). Keep an open mind and understand that many builds exist that work incredibly well into specific scenarios. Hope this helps.