The heart of the matter is not that any Kaspersky product has or is now being used to perform reconnaissance, espionage, or attacks. It is the fact that there are personnel with ties to intelligence agencies and also worries that individuals within the company will cooperate or can be unduly influenced to do things they would not otherwise do.
Is it a legit worry ? Probably, in terms of a worst-case scenario.
But then you also have to ask yourself this question - how much influence does the Chinese government security agencies have over all the digital device and PC manufacturers - including individual component suppliers ? Influence can be used to obtain cooperation or force an OEM subcontract supplier\assembler to put implants of various types right on the factory floor.
Is it a legit worry ? Probably, in terms of a worst-case scenario.
Agents being planted within the security soft industry where they have access to tons of juicy things is decades old.
If a person likes Kaspersky, it works for them, then they should use it. The greatest threats are not to home users but government systems.