Millions of people use app stores everyday. And I'd say a huge percentage of those people are the ones who would also download a program on their PC from download.com
Which sounds more accessible:
1) click package-manger program
2) type the name of the program you want to install
3) click install
OR
1) open web browser
2) go to http://yahoo.com
3) type google
4) click the first link
5) google "download program_i_want"
6) click on link leading to "www.download.com/malware/viruses/tracking/program_i_want"
7) stare at the dozen different DOWNLOAD! buttons, and wonder which one
8) click the biggest flashiest one
9) wait for it to finish downloading
(if it doesn't automatically start and installer)
a)open File explorer
b)Go to Downloads folder
c)wade through the hundreds of other downloads until you find kd457sfjgs_download_app_i_want_setup_INSTALLER.exe.EXE
10)Once the installer is started click the NEXT button a dozen times, inadvertently installing extra malware each time