The phrase "to require some thought" means that an action or situation needs to be carefully considered, analyzed, or contemplated before making a decision or understanding it fully. Full definition
Big money requires thinking about money without time considerations — think broad money. (entrepreneur.com)
Everything we do requires a thought process just to make sure we're not putting ourselves in a situation that would affect him. (gracegigglesandnaptime.com)
I can refer to the week's list of priorities which makes daily planning fast and simple and doesn't require thinking big. (inc.com)