It was a stupid decision in the first place to remove bot progression.
It was a perfectly working alternative system to progression already present in BF2042. Where we could get progression through bot games but on a limited basis. Which was totally fine.
But let us be honest, they didn't remove bots to fight "unfair progression adventage".
They removed them so people won't use portal that much. A game mode to which they didn't allocate enough resources. And instead of investing into more, they simply pulled out the carpet under the playerbase so we don't want to use portal anymore because there is no point to it.