Because TFP Soundwave is lacking cassettes (let's say that drones and cassettes are different), and his entire self is an amalgamation of Seeker and Cassette-Carrier...
Imagine, this Soundwave gets one whiff of a carrier in heat, and he's fighting for his damn life.
The suppression codes fail. Inactive protocols roar to life and made more potent with the long dormancy. Baser frame-instincts meld together to claw at his rationality.
Soundwave would be in a race against time between self-control and an overpowered rut. There is no tactic to truly leash it and lull everything back to slumber. His own frame betrays him further as it forcibly stops the paltry relief from his own hand or a rigged device in a demand to fully dedicate to search, hunt, hide, claim.
It gets to the point he needs to frag or fight as his spark surges constantly, temperature spiking, datacables writhing with the urge to constrict, mouth parched with denta aching, his panel is only closed by the sheer force of will-
And that carrier, no matter how far or well-hidden, will be tracked.
