This is incorrect, they are not just simple heals, but powerful ability counters.
A quick fight with the Breen highlights this. If you use your science team to counter a Breen cruisers SubNuke, you wont have ET available to counter their Target Subsystem attack they often use as a follow up.
Yeah, I forgot about the Science Debuffs that they counter. In any case, they still have lost their resistance bonuses.