Some would say access to restaurants / eateries / other forms of vended food fare establishments are no more fundamental than access to essential means of transport as cars are. No city anywhere makes it a part of its charter to promise its residents ready access to global fare at their doorstep. If personal vehicles are secondary to public transit, then restaurants are secondary to home cooking.
Also restaurants reserve the right to deny or pick who they serve and who they do not and may bar you from dining there if they do not like you or your appearance - so why should they be afforded public spaces in the form of parklets?