Why do they log in visual, because according to 61.57(c)
Instrument experience. Except as provided in
paragraph (e) of this section, a person may act as pilot in command under IFR or weather conditions less than the minimums prescribed for VFR only if:
(1) Use of an airplane, powered-lift, helicopter, or airship for maintaining instrument experience. Within the 6 calendar months preceding the month of the flight, that person performed and logged at least the following tasks and iterations in an airplane, powered-lift, helicopter, or airship, as appropriate, for the instrument rating privileges to be maintained in actual weather conditions, or under simulated conditions using a view-limiting device that involves having performed the following—
(i) Six instrument approaches.
(ii) Holding procedures and tasks.
(iii) Intercepting and tracking courses through the use of navigational electronic systems.
Note that it doesn't say actual instrument conditions. It says actual weather. All outside weather is actual. It's not like you're flying in an atmospheric simulator. Now, there is another (electronic only ?) publication out there that says the approach must be in (simulated) instrument conditions beyond a certain point to count. But according to only the CFR's any approach you fly is loggable for currency. And a lot of pilots have no idea where to find all the non-regulatory explanations.