67. Weak lensing and modifying gravity

Jochen Weller et al. are trying to constrain the modified gravity theories with weak lensing data combined with baryon acoustic oscillations and supernovae data. Namely, the authors are mostly interested to fit the Dvali-Gabadadze-Porrati model and its modification mDGP (one parametric matching between Lambda CDM and DGP).

The authors conclude that it is impossible to draw any conclusions from the present weak lensing data alone, but combined with BAO and SN, they show that DGP is disfavored.

Finally, the authors show that the future survey Euclid will be able to determine whether DGP has anything to do with reality or not.

Sorry, going to say a not politically correct thing… But it is unnecessary to disprove experimentally the not-quite-reliable theories or models which were already disproved theoretically (I mean now-famous DGP ghost) .

Am I right or being arrogant and unreasonable? Let me know