Bugs walking around, and bug carcases decaying inside a system are two very different things. Do you know what kind of chemical compounds will be created by the bacteria living in these insects starts to break down the body? No? Neither do I. Not to mention the damage that could be done by some pesticide to the electronics. Suppose, just for a moment, one of the compounds is electrically conductive enough it creates a bridge between data pathways on the motherboard. It could basically ruin the laptop until you find and remove the bridge, which would be near impossible without special tools.
And personally, I'd prefer to get the help of experts on bugs, rather than just charge in and potentially ruin my laptop. The best thing you could do, is take the laptop apart and used some compressed air to blow the bugs out. But I'm sure people in a university entomology department would have plenty more ideas. I know when I worked at a University, it had one of the bigger entomology departments in the country, and it was only about 150 people or so. When I'd fill in for a colleague there, they'd have two people who did little more than answer people's questions about bugs over the phone all day. One had a PhD, the other was a PhD candidate.
So if like the 4th largest entomology department in the nation can usually manage to get back to people within a day or so, I don't really see that as being terribly time consuming. I would also see it as quite prudent, given the cost of a new laptop should foolhardy actions result in the destruction of the current one.