The main way that tourism helps a city or area is by bringing an influx of economic growth to the area. Tourism is a huge industry and can help our local economies by supplying goods and services that the tourists need. However, tourism can also deteriorate cultural importance of an area as well.
I do believe that tourism's traditions can improve a city or an area if those traditions can have a positive social and economic impact. If those traditions can yield a net positive effect on how a certain culture or society conducts business or treats other individuals, then yes. Traditions are the buildings blocks of great societies and they strenghten the overall well being of nations.